北京林业大学“计蒜客”杯程序设计竞赛 网络赛 D-A letter from Chensg【最长公共子序列LCS】
Canitreallybe2yearssinceIfirstsawyou?Istillremember,vividly,2yearsago,fromthemomentIsawyousmile,asyouwerewalkingoutoftheclassroomandturnedyourheadback,withthesoftsunsetglowshiningonyourrosycheek,Iknew